SourcePoint 888 owners – low-end bass in open rooms?

@mcashiola, Mingus played an acoustic 4-string bass.  The open E string on that is around 42 Hz.  As a jazz fan I've long used that frequency as a minimal requirement for any speakers I've considered.  With that it has worked well for me with all the various music I listen to.

The problem with square or nearly square rooms is each dimension affects standing waves at a given frequency..  When those dimensions are repeated (wall to wall, wall to floor/ceiling) that doubles the impact on that frequency..  That can produce greater emphasis or suck outs.  In my experience the smoothest in-room response is best.

Rooms can be affected in three ways - reflection, dispersion, and absorption.  It will require experimentation so you'll need to try combinations of those in your new room.  Maybe added absorption on one or opposite walls to reduce the doubling.  But a problem comes from thicker material being necessary for lower frequency.  Also suspending the absorption panel out from the wall can increase effectiveness.  Good information can be found online at a few particular sites.

"For example, last night I played Blues and roots by Charles Mingus. I really thought it sounded fantastic. I had no complaints about low end while listening to that album. But, I’ve recently had a couple of folks comment to me on certain albums (albums they claim to know well) that my system wasn’t presenting the low end well and was too irritating in the mids and highs."

The OP once again, is presenting my observation.

It's not stated what actual recordings-pressings are used. New reissues/reissues done in the 80's or whatever.

Mingus album is a 1960 recording done arguably in the height of analog recording.

Charlie Mingus – Blues & Roots – Vinyl (LP, Album, Mono), 1960 [r3496796] | Discogs

Current reissue of that period Jazz is either "audiophile" or generic CD copy.

Doesn't make sense the OP is "sometimes" hearing a great recording, while most of the time not because the reason is some need for tweaky footers/advanced computer analysis of room nodes etc etc.

Not saying all those suggestions are invalid, or without merit.

The reason for subs is to enhance what's already there and add atmospheric/ambient low end. 

@mcashiola 

How many hours on them?  A couple hundred is  not unusual for the bass to be near fully developed.  

I have used this REL break in process for speakers and subwoofers and it really does accelerate the break in process.  It is not harmful to the speakers in any way. 

https://rel.net/blogs/learn-and-explore/how-to-break-in-a-subwoofer?srsltid=AfmBOoqb96QPdzlyRYfvIH58Ox0LZHKR943PwVk2DwZSp4qqtBNzQmX2

@avanti1960 thank you. I’ll check it out. I likely have under 100 hours.

@tablejockey Charles Mingus Blues & Roots (Atlantic 75 Series) 180g 45rpm 2LP,
Mastered by Kevin Gray at Cohearent Audio from the Original Analog Tape
Plated & Pressed at QRP and RTI

@mcashiola It is very possible because you are closing off the room your response will improve, even if you're going to a cube.  If you really want to understand this stuff, run pink noise through a microphone like a umik-1 and look at your frequency response.  You will learn a ton and also you can compare your current space to your next one.  Very informative and helpful in diagnosing issues and also will be just interesting to see how much your response changes by doing this!  I wish you the best of luck and if you get serious about your acoustics after this modification perhaps consider consulting Gik acoustics or another reputable acoustics company. The advice is free and they were invaluable for building my room.  Best of luck!